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प्रश्न
First guess the answer and then calculate:
2 × 175 = ?
उत्तर
This number will be near to 2 × 175 = 350
On calculation:
| 100 | 70 | 5 | |
| 2 | 100 × 2 | 70 × 2 | 5 × 2 |
| 200 | 140 | 10 |
By adding numbers in the last row you will get
200 + 140 + 10 = 350.
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